"Dependency for development" - Pycrypto remains unmaintained and buggy: use pycryptodome instead as suggested by pycrypto's offcial repository, please update the readme file for this repo!
Pycrypto's official repository doesn't seem to have been maintained, as such they have advised that users install Pycryptodome instead, as it creates a package with the same namespace as pycrypto, and can sync with source codes on pycrypto.
